Auctions are rare and gem valuation was considered more of an art than a science.
珠宝拍卖很少见,对其进行估价也更多地被视为一种艺术而非科学。
2
But Rostan thinks that the "science" ofvaluation would supply Spiegel with the answers and help him decide which offers to consider and which to reject.
The thesis points out that the evaluation standard ofscience and technology by Russian philosophical academia has changed, from objective judgment to valuation judgment.